I know why, one rear tire is almost bald and the other one isn't, but even that one sucks.
At the track yesterday my best time was 15.66 @ 87.01 and that was spinning the tires. The other 2 times were 17.01 and 15.861 and I lost 1st round due to poor traction.
I just had the tranny rebuilt. 2000 stall B&M shift kit, B&M rebuild kit, etc and it shifts hard. I can chirp 2nd gear
Not too many mid '80's Delta 88's can do that
I have GoodYear Eagle ST's on the rear. They came with the car. They are starting to dry rot. Can't even think about driving the car in the rain, make a right turn and the rear kicks out very easy, even below 10 miles per hour.
On the good side, the car is now 98% leak free. no more torque convertor leak, or oil pan gasket leak. the Valve cover gaskets are still leaking, but that's a 1 hour weekend project for me